Simulation and analysis of software defined cognitive frequency hopping multi beam satellite system by Heng-zhi LI, Chun-feng WANG

“…Traditional multi-beam satellites cannot adapt to the changing traffic because of the fixed bandwidth and cannot adjust dynamically for the traffic load.In the future,the multi-beam broadband satellite system must have great flexibility and can be dynamically adjusted according to the change of the traffic flow.Beam hopping for multi-beam broadband satellite network system has been proposed to improve the traditional multi-beam broadband satellite network system performance,whose principle is to assign different beams to different time slots,rather than the allocation of bandwidth,so that in each time slot,the entire available bandwidth is allocated to each beam,and the time window is periodically applied to the beam selection system ,in the full band hopping mode,the band can be selected optimally in the duration of each beam to meet user transmission bandwidth and delay requirements.With the development of cognitive radio technology,cognitive beam hopping for multi-beam satellite system can further improve the efficiency of spectrum utilization,to meet the growing shortage of spectrum resources,to achieve large-capacity high-bandwidth broadband satellite network system,and to support the rising user service capacity and the transmission efficiency of user services under different load conditions.In addition,software definition technology is also used in satellite networks,which could achieve effective management of satellite resources to improve the utilization of satellite resources.In this paper,the principle of software-defined cognitive hopping multi-beam broadband satellite network system is discussed.The spectrum utilization efficiency and throughput are analyzed,which can be used as a reference for broadband satellite network system design.…”
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Heat Transfer in U-Tubes: Simulating the Performance of Delta Winglet Pairs in Laminar and Turbulent Flows by Fotis Naoumis, Harris Linardos, Giouli Mihalakakou, John A. Paravantis, Vassilis Kostopoulos

“…This simulation study examined three different arrangements of triangular vortex generators in a common flow-down configuration within a U-turn tube to optimize heat transfer. The analysis conducted under constant wall temperature conditions across a range of Reynolds numbers spans both laminar and turbulent flow regimes to evaluate the broader impacts of vortex generators on flow and thermal fields. …”
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Fan Blade Crack Detection Algorithm Based on Multi-Scale Feature Fusion by Yongjun Qi, Hailin Tang, Altangerel Khuder

“…The image position can be accurately captured and the recognition rate is greatly improved through the optimized convolutional neural network, which can provide a reference for future research in other fields.…”
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A New Approach to the Economic Problem of Dumping based on Game Theory with Grey Parameters by Davood Darvishi Selokolayi, Samira Heydari Gorji

“…A lot of data is needed to solve business problems and issues, and given that real-world data usually involves uncertainty, using definite methods in a real, inaccurate environment will not be suitable for optimal decision-making. Therefore, this article intends to study the issues of dumping and anti-dumping in countries' trade relations with the help of game theory in the environment of grey uncertainty. …”
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Study on In Situ Stress Measurement and Surrounding Rock Control Technology in Deep Mine by Zhongcheng Qin, Bin Cao, Yongle Liu, Tan Li

“…Based on the stress field research of bolt and cable, the optimal prestress ratio of bolt and cable is proposed as 3. …”
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Dual-Modal Approach for Ship Detection: Fusing Synthetic Aperture Radar and Optical Satellite Imagery by Mahmoud Ahmed, Naser El-Sheimy, Henry Leung

“…For SAR images, a customized Detection Transformer model, SAR-EDT, integrates advanced denoising algorithms and optimized pooling configurations. A fusion module evaluates the overlaps of detected bounding boxes based on intersection over union (IoU) metrics. …”
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Gut Microbiota–Tumor Microenvironment Interactions: Mechanisms and Clinical Implications for Immune Checkpoint Inhibitor Efficacy in Cancer by Said SS, Ibrahim WN

“…By integrating insights from recent preclinical and clinical studies, we aim to shed light on the potential of microbiome modulation as an adjunct to cancer immunotherapy and as a diagnostic tool, paving the way for personalized therapeutic approaches that optimize patient outcomes.Keywords: ICIs, immunotherapy, gut microbiota, microbiome, tumor microenvironment…”
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Recycled PVC content and particle size distribution effects on morphological and mechanical properties of expanded PVC layer for floorcoverings by Chaouch, Walid, Msahli, Slah

“…It investigates the use of recycled Polyvinyl chloride (PVC) powder as a substitute for conventional PVC resin in the expanded layer of floorcoverings without negative effects on their mechanical properties.The first challenge is to transform PVC-coated fabric waste into PVC powder completely separated from PET fibers, while simultaneously ensuring the optimal recovery of small PVC particles. Then, a comprehensive investigation focused on understanding the behavior and characteristics of recycled PVC powders. …”
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Separation of Some Anionic Dyes Using Reverse Micelles of CTAB and SDS as Efficient Surfactants Adsorbents from Aqueous Medium by Heba M. El Refay, Nagwa Badawy, Amina Hamada, El Shimaa Hassen

“…Recovery of the solvent and the reuse of dyes and surfactants after extraction of dye molecules from reverse micelles surfactant core considered are very important from an economic point of view. The optimized conditions were 7 ± 0.2 solution pH, 9 × 10−2 mol/L extractant concentration, 1M NaOH stripping agent concentration, 60 min extraction time, 6 × 10−5 mol/L dye concentration, and 1 : 1 aqueous to organic (A/O) ratio. 87–93% of dyes were extracted at experimental optimum conditions.…”
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Pengembangan model kolaborasi antara sekolah dan puskesmas dalam Implementasi trias uks berdasarkan pedoman nasional by Tuti Rohani, Darmawansyah, Nimas Ayu Lestari Nurjanah, Wulandari

“…Hasil penelitian menunjukkan bahwa hambatan utama mencakup keterbatasan fasilitas UKS, kurangnya integrasi pendidikan kesehatan, dan koordinasi yang belum optimal. Faktor keberhasilan meliputi koordinasi yang lebih baik, pembagian peran yang jelas, dan dukungan sumber daya. …”
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Zero-shot reranking with dense encoder models for news background linking by Marwa Essam, Tamer Elsayed

“…While being effective, that method is still far from being optimal. Furthermore, it only leverages the lexical matching signal between the input article and the candidate background links. …”
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Evaluation of nigella sativa's cold press oil as vaccine adjuvant by Uçkun Sait Uçan, Aslı Sakmanoğlu, Ali Uslu, Zafer Sayın, Ecem Oğlakçı Cansoy

“…<p> <b>Results:</b> Sera and conjugate were optimally diluted 1/200 and 1/40.000, respectively. …”
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Study and personal resources of university students’ academic resilience and the relationship with positive psychological outcomes by Dalia Bagdžiūnienė, Irena Žukauskaitė, Laima Bulotaitė, Rūta Sargautytė

“…Academic resilience, defined as students’ capacity to endure challenges while sustaining optimism, positive thinking, and emotional stability, is crucial in enabling individuals to navigate academic difficulties and foster future success. …”
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The Importance of Ubiquitination and Deubiquitination in Cellular Reprogramming by Bharathi Suresh, Junwon Lee, Kye-Seong Kim, Suresh Ramakrishna

“…Ubiquitination and deubiquitination must occur in a timely and well-coordinated manner to regulate the protein turnover of several stemness related proteins, resulting in optimal embryonic stem cell maintenance and differentiation. …”
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A CRITIC-CODAS Approach for Ranking WirelessCommunication Technologies in Precision Agriculture: Application to Irrigation System by Khadeejah Adebisi Abdulsalam, Damilare Babatunde, John Adebisi, Olubayo Babatunde

“…This systematic evaluation approach can be extended to other smart agriculture applications to optimize technology adoption. …”
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New directions processing of technogenic waste of the copper industry by B. R. Vokhidov, A. S. Khasanov, B. M. Nemenenok, G. F. Mamaraimov

“…Based on the study of this topic and the analysis of the results of the research, the authors proposed an optimal technology and complex methods for extracting platinum, palladium and rhodium from industrial waste using selective methods suitable for each metal separately using hydrometallurgy and pyrometallurgy. …”
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A Unified Bayesian Model for Generalized Community Detection in Attribute Networks by Qiang Tian, Wenjun Wang, Yingjie Xie, Huaming Wu, Pengfei Jiao, Lin Pan

“…Thus, the model can detect broad types of network structure regularities, including assortative structures, disassortative structures, and mixture structures and provide multiple semantic descriptions for the communities. To optimize the objective function of the model, we use an effective Gibbs sampling algorithm. …”
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A Deep Learning Based Traffic State Estimation Method for Mixed Traffic Flow Environment by Fan Ding, Yongyi Zhang, Rui Chen, Zhanwen Liu, Huachun Tan

“…Finally, we use the concept of operational efficiency for reference, dividing traffic state into three categories according to the estimated speed: free flow, optimal flow, and congestion. SUMO is used to simulate traffic cases under different penetration rates to evaluate our scheme. …”
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Cough in non-cystic fibrosis bronchiectasis by Ahmad Kantar, Woo-Jung Song, Andrew Bush, Grigorios Chatziparasidis

“…The primary objectives of physiotherapy regimens in NCFBE are mucus hydration and the establishment of an optimal expiratory airflow velocity, which exerts shearing forces on the mucus located on the airway surface. …”
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Optimisation of Graphene Nanofiller Addition on the Mechanical and Adsorption Properties of Woven Banana/Polyester Hybrid Nanocomposites by Grey-Taguchi Method by L. Natrayan, P. V. Arul Kumar, S. Kaliappan, S. Sekar, Pravin P. Patil, G. Velmurugan, Murtesa Dabesa Gurmesa

“…The confirmation test by the optimal process value utilising the grey relation analysis is considerably better than the actual test data. …”
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